PDF malware analysis — malicious · d7547b6c02d300a3

MALICIOUS

PDF

76.8 KB Created: 2021-09-17 07:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: dffb14bc09add1b397612e36c6244ec6 SHA-1: 5f67b362519ade3a58dfe15097a8f23e586a954a SHA-256: d7547b6c02d300a36ba183df9460ed96cc27ee730624ea752e06b2babfe9822d

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which are structured with UTM parameters, suggesting a phishing or malicious download lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing the user to provide a password for an archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9963

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://coretry.ru/uplcv?utm_term=gta+vice+city+cleo+mod+android PDF link annotation
- https://akapacha.com/userfiles/file/16465547941.pdfIn PDF document text
- http://hflchw.com/upload/file/xefenasulaxabiw.pdfIn PDF document text
- http://nguoiquangphianam.com/uploads/files/30306181187.pdfIn PDF document text
- http://tuzvedo.hu/elemek/file/68452403960.pdfIn PDF document text
- http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jununulutokalekuviginixat.pdfIn PDF document text
- http://refpecsbelvaros.hu/kepek/files/83264616183.pdfIn PDF document text
- https://lideregitimpaketleri.com/calisma2/files/uploads/75388497821.pdfIn PDF document text
- http://merklink.nl/site/data/ws/files/58439518249.pdfIn PDF document text
- http://alompar.hu/uploads/content_files/files/37207054431.pdfIn PDF document text
- http://swaving-stalinrichting.nl/ckfinder/userfiles/files/50991252666.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/gozumezavu.pdfIn PDF document text
- http://terrietanaka.com/library/files/fidofokipofumu.pdfIn PDF document text
- https://aayams.com/userfiles/file/janakoxexal.pdfIn PDF document text
- https://drjou-vc.com/upload/files/12688885503.pdfIn PDF document text
- https://cv-vezouze.fr/media/file/80031186392.pdfIn PDF document text
- https://www.bevillelecomte.com/ckfinder/userfiles/files/komisikumuxow.pdfIn PDF document text
- https://southwestlooms.com/admin/userfiles/files/xadatafonatuxefiw.pdfIn PDF document text
- http://tonioloclaudio.it/userfiles/files/nukepulosuturoz.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/lutiwunidepolipuvuge.pdfIn PDF document text
- http://vsrru.ru/userfiles/file/zosivutazuxuxosomirof.pdfIn PDF document text
- http://ceresasrl.it/userfiles/files/roxewitubelowawebekom.pdfIn PDF document text
- http://bosch-elektronarzedzia.pl/catalog/file/9036873966.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c4ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dcbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCBE	18420 bytes
SHA-256: `6b0c66129cc754ba70f98c3bd38524f0b58c6ee30fa0b64f327d9882a13f4f54`
`font_02_sfnt_off00010de3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DE3	10584 bytes
SHA-256: `40b2799e714e80dfceba673828ea2eded26a233746b6901dd143866e77441721`

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